Mat with surface pattern



FIG. 1 is a top view of a mat with surface pattern, embodying our new design;

FIG. 2 is a left side view thereof; the right side view being a mirror image of the left side view; and,

FIG. 3 is a front view thereof; the rear view being a mirror image of the front view.

The broken lines are included for showing features that form no part of the claim. The numbers and small vertical line features shown in FIG. 1 are all drawn in broken line indicating that these features depict portions of the mat with surface pattern that form no part of the claimed design. 

CLAIM The ornamental design for a mat with surface pattern, as shown and described. 